>1a3xB (B:) observed residues (from ATOM records)
msrlerltslnvvagsdlrrtsiigtigpktnnpetlvalrkaglnivrmnfshgsyeyh
ksvidnarkseelypgrplaialdtkgpeirtgtttndvdypippnhemifttddkyaka
cddkimyvdyknitkvisagriiyvddgvlsfqvlevvddktlkvkalnagkicshkgvn
lpgtdvdlpalsekdkedlrfgvkngvhmvfasfirtandvltirevlgeqgkdvkiivk
ienqqgvnnfdeilkvtdgvmvargdlgieipapevlavqkkliaksnlagkpvicatqm
lesmtynprptraevsdvgnaildgadcvmlsgetakgnypinavttmaetaviaeqaia
ylpnyddmrnctpkptsttetvaasavaavfeqkakaiivlstsgttprlvskyrpncpi
ilvtrcpraarfshlyrgvfpfvfeketddvearinfgiekakefgilkkgdtyvsiqgn
tlqvstv